D archived mineral specimens

Demesmaekerite

#DC45944

Availability: Sold

Locality: Musonoi mine, Kolwezi, Shaba Cu belt, DR of Congo
Formula: Pb₂Cu₅(UO₂)₂(Se⁴⁺O₃)₆(OH)₆·2H₂O
Size: Miniature 4.5x4x3cm
Tagged: copper
Special Info: XRD Confirmed

Dark green tiny prismatic crystals, less than 1mm, of Demesmaekerite (XRD) in with Guilleminite (yellow) and mustard yellow plates of Marthozite. A good specimen. Ex. William Pinch. The matrix is selenium Digenite. Radioactive. Older labels (see prov. tab)

Demesmaekerite at Dakota Matrix Demesmaekerite at WebMineral Demesmaekerite at MinDat

Derriksite

#52944

Availability: Sold

Locality: Musonoi mine, Kolwezi, Shaba Cu belt, DR of Congo
Formula: Cu₄(UO₂)(Se⁴⁺O₃)₂(OH)₆
Size: SmCabinet 5.5x4x3.5cm
Tagged: copper
Special Info: Radioactive!!

Rich, excellent specimen of Derriksite with a few other goodies. The Derriksite, at the red arrows, is glassy, dark green, somewhat prismatic crystals around 1mm and in clusters to from 2-4mm. The Demesmaekerite, at the orange arrows, is an olive green elongated crystals to 3mm. The Chalcomenite is a beautiful glassy blue color at the blue arrow. It is an ex William Pinch specimen.

Derriksite at Dakota Matrix Derriksite at WebMineral Derriksite at MinDat

Desautelsite

#54045

Availability: Sold

Locality: Artinite pit, Clear Creek, San Benito Co., California, United States
Formula: Mg₆Mn³⁺₂CO₃(OH)₁₆·4H₂O
Size: SmCabinet 6x4x1.5cm
Tagged: carbonate

Orange finely crystalline Desautelsite with Artinite. Excellent rich specimen.

Desautelsite at Dakota Matrix Desautelsite at WebMineral Desautelsite at MinDat

Desautelsite

#GJ36943

Availability: Sold

Locality: Artinite pit, Clear Creek, San Benito Co., California, United States
Formula: Mg₆Mn³⁺₂CO₃(OH)₁₆·4H₂O
Size: Miniature 5x3x2.5cm
Tagged: carbonate

Orange platy crystals less than 0.5mm composing of most of the matrix with Serpentine and white Artinite.

Desautelsite at Dakota Matrix Desautelsite at WebMineral Desautelsite at MinDat

Descloizite

#20834

Availability: Sold

Locality: Berg Aukus, Grootfontein dist., Namibia
Formula: PbZnVO₄(OH)
Size: SmCabinet 6x4x3cm
Tagged: Holiday Sale , vanadium

Cluster of superb translucent, chocolate brown, arrow-head shaped crystals of Descloizite to 1cm. Nice, clean specimen with only one crystal broken off on the backside.

Descloizite at Dakota Matrix Descloizite at WebMineral Descloizite at MinDat